Autotrail water pump (1 Viewer)

Oct 14, 2007
4,034
6,357
Rochester
Funster No
619
MH
Auto-Trail Mohawk
Exp
17 fun filled years
I have a 2013 Autotrail Mohawk that has an occasional fresh water pump prob where it won't shut down. I think the pressure switch gets stuck because if I tap the pump housing it shuts off. The pump is a Shurflo 4029-181-A32 and it was probably fitted to most Autotrails around that time. I have searched the internet to within an inch of its life to find a replacement pressure switch to no avail. The nearest I can get is one for a Shurflow Aqua King 11 Junior but I have no way of knowing if it's compatible.

Has anyone managed to get replacement parts for the 4029-181-A32
 

Gellyneck

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Jun 5, 2014
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More than toes wet now!
I have a 2013 Autotrail Mohawk that has an occasional fresh water pump prob where it won't shut down. I think the pressure switch gets stuck because if I tap the pump housing it shuts off. The pump is a Shurflo 4029-181-A32 and it was probably fitted to most Autotrails around that time. I have searched the internet to within an inch of its life to find a replacement pressure switch to no avail. The nearest I can get is one for a Shurflow Aqua King 11 Junior but I have no way of knowing if it's compatible.

Has anyone managed to get replacement parts for the 4029-181-A32
Hi Dane
When I had a problem with our pump (same model as yours) in our 2013 Savannah I too struggled to find the same model as a replacement. I tried the manufacturer but they just pointed me at AT but they were no real use either!
The best I could come up with was Shurflo Trail King 7 2095-204-112 & 412 rated at 20psi, 7.0l/m however they are three pot whereas ours are four pot pumps. Specs looks the same though.
Google brings up various supplier options.
As it worked out the issue cleared itself so didn't need to replace.
Would be interested on how you get on.
 

138go

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Feb 26, 2016
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Fit something decent like a Jabsco pump. We have had one in a boat and MH has one. Nice and quiet and good range of different pressures but not cheap.
 
OP
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Diabalo
Oct 14, 2007
4,034
6,357
Rochester
Funster No
619
MH
Auto-Trail Mohawk
Exp
17 fun filled years
The Aqau King II junior does have four pots and looks the same but no way of telling unless I can get both side by side. Not sure why most are 3 pot or what the benefit of four is.

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Gellyneck

LIFE MEMBER
Jun 5, 2014
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More than toes wet now!
The Aqau King II junior does have four pots and looks the same but no way of telling unless I can get both side by side. Not sure why most are 3 pot or what the benefit of four is.
Don't know if you've found this or not but it's their website. Not much use as no reference to the model you're trying to replace.

ps not sure if you've got the documentation for the pump -
 

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  • 4029-181-A32 datasheet.pdf
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  • 4029-181-A32 manual.pdf
    232.3 KB · Views: 128
Last edited:
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Diabalo
Oct 14, 2007
4,034
6,357
Rochester
Funster No
619
MH
Auto-Trail Mohawk
Exp
17 fun filled years
I had the installation sheet but not the data sheet so thanks for that. On the web link page I can't see a 20 psi model and need to keep to that or there is a potential risk to the boiler if the pump pressure is increased. I have e-mailed Pentair and asked what the direct replacement is, so will post back if I get e reply. As said above I think it's the Aqua King II junior but want to be sure.
 

John&Kate

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Aug 30, 2015
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Since Sept 2015
On our Arapaho, we have learnt that the pump only gets stuck on when you dont open the tap long enough, if you open a tap and close it quickly the pump stays on, if you open the tap for longer the pump shuts down.
 
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Diabalo
Oct 14, 2007
4,034
6,357
Rochester
Funster No
619
MH
Auto-Trail Mohawk
Exp
17 fun filled years
On our Arapaho, we have learnt that the pump only gets stuck on when you don't open the tap long enough, if you open a tap and close it quickly the pump stays on, if you open the tap for longer the pump shuts down.

I don't thinks that's the case for me but will take a note of what you have said and check. I think mine normally does it when it's not been used for awhile, once away and constantly using it the problem goes away, that's why I think it's the pressure switch getting stuck. The other thing I have not tried is adjusting the bypass and pressure switch , I will give them a tweak the next time we are away.
 

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